Expression-regulator for pianos



.(No Model.)

J. Y. DRUCKENMILLBR.

EXPRESSION REGULATOR FOR PIANOS.

No. 482,168. Patented Sept. 6, 1892.

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Pneu: en.. 00TH UNITED STATES PATENT OFFICE.

JOSEPH Y. DRUOKENMILLER, OF J ENKINTOWN, PENNSYLVANIA.

EXPRESSION-REGULATOR FOR PIANOS.

SPECIFICATION forming part of Letters Patent No. 482,168, datedSeptember 6, 1892.

Application led May 16,1892. Serial No. 433,134. (No model.)

To all whom, t may concern:

Be it known that I, JOSEPH Y. DRUCKEN- MILLER, a citizen of the UnitedStates, residing at Jenkintown, county of Montgomery, and State ofPennsylvania, have invented a new and useful Improvement in Expression-Regulators for Pianos, which improvement is fully set forth in thefollowing specification and accompanying drawings.

My invention consists of an attachment to a piano, constructedsubstantially as hereinafter described, whereby the character of themusic that is performed may be expressed or regulated.

Figure 1 represents a side elevation of a piano expression-regulatorembodying my invention. Fig. 2 represents a front view thereof on areduced scale. Fig. 3 represents a bottom plan View thereof. Fig. 4represents a perspective View thereof.

Similar letters of reference indicate correponding parts in the severalfigures.

Referring to the drawings, A designates a piano, which, excepting thefeatures of my invention applied thereto, is of usual construction.

To a portion of the case of the instrument beneath the keyboard ispivoted the kneepiece B, whose inner end is provided with a roller O,which latter bears against a lever D, which is pivoted adjacent to saidknee-piece.

E designates a vertically-arranged lever, which is mounted within thebody or case of sisting of a pivoted knee-piece and two pivoted leversadapted to be attached to the casing of the piano, said parts beingcombined substantially as described.

2. An expression-regulator for a piano, consisting of a knee-pieceadapted to be pivoted to the casing of a piano and having a rollerjournaled on one end, a pivoted lever having one end in contact withsaid roller, a vertically-pivoted lever within the piano-casing, havingits lower end in contact with one end of said first-mentioned levers andits upper end adapted to contact with the hammer rest rail or head ofthe piano, said parts being combined substantially as described.

JOSEPH Y. DRUOKENMILLER.

